Plan the work
Carry the estimate into the job plan.
The useful result is not just the number. It should support owners, programme assumptions and delivery readiness.
Workflow
Length
Steel & Fabrication
CHS Weight Calculator.
Estimate circular hollow section weight from diameter, wall thickness and length. Free online tool for UK construction and trade teams.
Connected calculator
Live estimate
Use the result as a planning estimate, then turn it into tasks, templates, evidence and delivery records.4Inputs
2Results
3Trade tags
Estimate In Product
Put the calculation beside the workflow it informs.
CHS Weight Calculator is a quick way to test the number. Zektrx gives that number a route into planning, materials, evidence and reporting once the work starts moving.
1
Plan the work
Length
2
Check materials
CHS weight
3
Report the decision
Fabrication Management
Check materials
Turn quantities into stock and purchase context.
Material estimates can connect to stock checks, reservations, purchasing notes and job-linked records.
Workflow
CHS weight
Report the decision
Keep assumptions visible after the calculation.
Saved outputs can support reports, handover packs, client review and repeatable estimating habits.
Workflow
Fabrication Management
mm
mm
kg/m3
Instant Results
CHS weight
13.48kg
Estimated total CHS weight.
Weight per metre
13.48kg/m
Estimated linear weight.
Estimate To Evidence
Make the result useful beyond the screen.
A calculator result is most useful when it feeds the job plan, material checks and team briefing that follow the estimate.
Measure the work
Use the estimate as a planning input for scope, labour, equipment and site readiness.
Plan materials
Turn quantities into stock checks, purchasing notes and job-linked material records.
Brief delivery
Give teams the assumptions, limits and checks behind the number before work starts.
Explanation
What this calculates
The internal diameter is estimated by deducting twice the wall thickness from the outside diameter.
Formula
Area = outside circle - inside circle; weight = area x density x length
Inputs are validated on screen and converted where unit options are available.
Worked Example
Example result
A 6 m length of 114.3 mm OD x 5 mm wall CHS weighs about 80.85 kg.
Knowledge Journey
Learn, use, then automate.
1. Learn
GuideInternational terminology
Mechanical contractors Ireland software guide
Ireland mechanical contractor software guide for RAMS, plant records, permits, safety statements, O&M evidence and handover workflows.
GuideInternational terminology
Mechanical contractors United Kingdom software guide
UK mechanical contractor software guide for RAMS, COSHH, plant records, permits, inspections, O&M evidence and Zektrx workflow rollout.
GuideStock/materials
Construction materials tracking guide
A practical guide to tracking construction materials from supplier and purchase order through delivery, allocation, use and evidence.
2. Use
CalculatorSteel & Fabrication
Round Bar Weight Calculator
Calculate round bar weight from diameter, length and material density. Free online tool for UK construction and trade teams.
CalculatorSteel & Fabrication
Bolt Quantity Calculator
Calculate bolt counts for repeated rows, plates, brackets and connection schedules. Free online tool for UK construction and trade teams.
CalculatorSteel & Fabrication
Angle Iron Weight Calculator
Estimate equal angle steel weight from leg size, thickness and length. Free online tool for UK construction and trade teams.
3. Automate
Featurefabrication
Fabrication Management Software
Connect fabrication jobs, materials, drawings, QA and site install evidence.
Featurestructural steel
Structural Steel Contractor Software
Manage structural steel RAMS, drawings, fabrication and install records.
Featurestructural steel
Structural Steel EN1090 Software
Organise structural steel evidence, quality records and EN1090-related workflows.
4. Start
Manage steel projects in Zektrx.
Connect RAMS, drawings, fabrication records, site evidence, materials and handover around one steel workflow.
Manage Steel ProjectsRelated Content
Connected calculators, templates and workflows.
Related Guides
Keep learning
GuideInternational terminology
Mechanical contractors Ireland software guide
Ireland mechanical contractor software guide for RAMS, plant records, permits, safety statements, O&M evidence and handover workflows.
GuideInternational terminology
Mechanical contractors United Kingdom software guide
UK mechanical contractor software guide for RAMS, COSHH, plant records, permits, inspections, O&M evidence and Zektrx workflow rollout.
GuideStock/materials
Construction materials tracking guide
A practical guide to tracking construction materials from supplier and purchase order through delivery, allocation, use and evidence.
Related Calculators
Run the numbers
CalculatorSteel & Fabrication
Round Bar Weight Calculator
Calculate round bar weight from diameter, length and material density. Free online tool for UK construction and trade teams.
CalculatorSteel & Fabrication
Bolt Quantity Calculator
Calculate bolt counts for repeated rows, plates, brackets and connection schedules. Free online tool for UK construction and trade teams.
CalculatorSteel & Fabrication
Angle Iron Weight Calculator
Estimate equal angle steel weight from leg size, thickness and length. Free online tool for UK construction and trade teams.
Related Templates
Document the work
TemplateMethod Statements
Method Statement Template
Plan the safe sequence of work, people, plant, materials, controls and hold points. Free, editable construction template from Zektrx.
TemplateEquipment Checks
Equipment Pre-use Checklist
Check equipment condition, guards, inspections, certificates, defects and safe use controls. Free, editable construction template from Zektrx.
TemplateITPs
Inspection and Test Plan Template
Define hold points, witness points, acceptance criteria and evidence for quality control. Free, editable construction template from Zektrx.
Related Features
Automate the workflow
Featurefabrication
Fabrication Management Software
Connect fabrication jobs, materials, drawings, QA and site install evidence.
Featurestructural steel
Structural Steel Contractor Software
Manage structural steel RAMS, drawings, fabrication and install records.
Featurestructural steel
Structural Steel EN1090 Software
Organise structural steel evidence, quality records and EN1090-related workflows.
Related Industries
Trade workflows
Industrysteel fabricators
Steel Fabricators Software
RAMS, drawings, workshop records, install evidence and handover workflows for steel fabricators. One platform for documents, evidence and compliance.
Industrymechanical
Mechanical Contractors Software
Mechanical contractor RAMS, permits, plant records, drawings, inspections and handover workflows. One platform for documents, evidence and compliance.
Related FAQs
Can this estimate rebar?
Yes for simple weight checks, although the rebar calculator is better for bar spacing and grid quantities.
From Round Bar Weight Calculator
Does this include cut waste?
No. Add waste and stock-length allowances separately.
From Round Bar Weight Calculator
Does this check bolt design?
No. Structural bolt design must be checked by competent designers.
From Bolt Quantity Calculator
Should nuts and washers be included?
Use the bolt count as the base for associated nuts, washers and spares.
From Bolt Quantity Calculator
FAQ
Calculator questions.
Does this work for pipe?
It can estimate pipe weight when outside diameter, wall thickness and density are known.
Why might supplier tables differ?
Manufacturing tolerances and rounded section properties can create small differences.
Next Step
Manage steel projects in Zektrx.
Connect RAMS, drawings, fabrication records, site evidence, materials and handover around one steel workflow.